For turbine-powered aircraft, start and shutdown procedures should be taken from which source?

• A. Position the aircraft into the wing
• B. Clear the prop blast or jet exhaust areas
• C. If external power is used, ensure it is sufficient for the start and can be safely disconnected
• D. Manufacturer's checklist

Answer: (D)

The main idea is that starting and shutting down a turbine engine must follow the exact steps published by the manufacturer. Those procedures are engine- and aircraft-specific, detailing the correct order, timing, and limits for engaging the starter, ignition, fuel flow, and aftercare to protect components from damage. Using the manufacturer’s checklist ensures the proper sequence, verifies critical parameters, and flags any limitations (like starter duty cycles or temperature restrictions) so the start or shutdown is safe and reliable. Other safety considerations, such as keeping people clear of exhaust or confirming external power readiness, are important practical checks, but they don’t provide the authoritative, model-specific procedure. The manufacturer’s checklist is the definitive source for these operations.